BeiGene Ltd is a United States based clinical-stage biopharmaceutical company. It is engaged in the discovery and development of molecularly targeted and immuno-oncology drugs for the treatment of cancer. The company has developed a proprietary cancer biology platform that addresses the importance of tumor-immune system interactions and the value of primary biopsies in developing new models to support its drug discovery effort. It has developed clinical-stage drug candidates that inhibit the important oncology targets Bruton's tyrosine kinase, or BTK; RAF dimer protein complex and PARP family of proteins, and an immuno-oncology agent that inhibits the immune checkpoint protein receptor PD-1.